Add Contributing.md mentioning to how to create PR to WebKit (instead of doing it through GitHub UI)

• Component: Tools / Tests
• Status: NEW ---

[Yusuke Suzuki]

Contributing.md can be shown when opening PR via GitHub UI.
While we are using tools (git-webkit) to create PR with specific format, it is not easily obvious to new contributors.
Let's add Contributing.md mentioning to

1. The way to create PR through git-webkit (and introducing https://github.com/WebKit/WebKit/wiki/Contributing link)
2. Not creating a PR though GitHub UI in a normal way (just creating a branch and PR)

[Yusuke Suzuki]

Some examples.

LLVM https://github.com/llvm/llvm-project/blob/main/CONTRIBUTING.md
FoundationDB https://github.com/apple/foundationdb/blob/main/CONTRIBUTING.md
Swift https://github.com/apple/swift/blob/main/CONTRIBUTING.md
Go https://github.com/golang/go/blob/master/CONTRIBUTING.md

[Tetsuharu Ohzeki [UTC+9]]

Additionally, I think it’s better to add a PR template like https://github.com/llvm/llvm-project/blob/main/.github/PULL_REQUEST_TEMPLATE.md

I guess strongly some people will not read CONTRIBUTING.md because it’s shown as a link. But PR template fills the form to create PR.

[Yusuke Suzuki]

PULL_REQUEST_TEMPLATE sounds good.
We should offer the best way for contributors to access to the expected procedure so that we will not waste contributors' time and their patches!

[Jonathan Bedard]

(In reply to Yusuke Suzuki from comment #3)
> PULL_REQUEST_TEMPLATE sounds good.
> We should offer the best way for contributors to access to the expected
> procedure so that we will not waste contributors' time and their patches!

Adding the PR template in https://bugs.webkit.org/show_bug.cgi?id=239347

[Radar WebKit Bug Importer]

<rdar://problem/91940821>